Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849368 | Method of producing a two-dimensional electron gas semiconductor device | Yoshimi Yamashita, Kinjiro Kosemura, Hidetoshi Ishiwari, Sumio Yamamoto | 1989-07-18 |
| D299631 | Four-wheeled motorcycle | Yasuhiro Oba, Akira Watanabe, Koji Miwa | 1989-01-31 |